- LabelMe: The open annotation toolLabel pictures with various vocabulary terms.
- Quizlet › The End of FlashcardsGreat site for learning vocabulary
- Knowtes - Online flashcard-based study and learning communityKnowtes is a flashcard-based learning community. By adding a card to your Knowtes memory, it becomes due at optimized intervals. The Knowtes Adaptive Learning Engine then adjusts how frequently you have to study cards in your memory based on how well you do...